/Engine/Source/Runtime/Analytics/AnalyticsET/Public/AnalyticsProviderETEventCache.h
Flushes the cache as a UTF8 char array. Returns a uint8 because that's whatIHttpRequestprefers. If nothing is cached, returns an empty array.
[TArray](API\Runtime\Core\Containers\TArray)< uint8 > FlushCacheUTF8()